The Lo Wu Phase II sewage treatment plant project is located at the Lo Wu station in Hong Kong. This station is the most heavily used immigration control point for passengers travelling to and from Shenzhen, mainland China. The plant was nearing the end of its asset life, so MTR Corporation initiated a refurbishment of the facility to extend its life so as to continue the critical process of wastewater treatment.
Aurecon was initially appointed to undertake a feasibility study into the existing condition and performance of the sewage treatment plant, identify refurbishment options, and develop a preliminary design based on MTR Corporation’s preferred refurbishment option. Aurecon was then appointed to carry out the detailed design for the preferred option.
Designs incorporated safety, applicability, constructability, ease of maintenance, reliability and cost effectiveness, in order to meet site constraints, restrictions in train operations and difficult access conditions.
Drawing on Aurecon’s knowledge and experience in wastewater treatment, the engineers assessed the treatment plant with a view to optimise performance with necessary upgrades. The feasibility study identified a range of new technology to be retrofitted to the existing infrastructure so as to extend the life of the treatment facility and increase its efficiency in removing organic pollutants from wastewater.
To minimise disruption to station operations, Aurecon’s engineers used 3D scanning technology to gain a greater understanding of the layout of the facilities. For the construction period, Aurecon’s design calls for the use of an existing sludge holding tank as a temporary storage, and a tanker to collect incoming flows in the interim.
When completed, the refurbished MTR Lo Wu Sewage Treatment Plant provides continued wastewater treatment and processing well into the future for at least 240,000 daily trips by passengers between Hong Kong and mainland China.